Abstract
This paper first introduces the concept of universal designated verifier ring signature (UDVRS), which not only allows members of a group to sign messages on behalf of the group without revealing their identities, but also allows any holder of the signature (not necessary the signer) to designate the signature to any designated verifier. According to whether the designator has a registered public key, two kinds of UDVRS are proposed. In order to distinguish the two types of UDVRS, we call it UDVRS Proof (UDVRSP) if the designator has not a registered public key, and this protocol is interactive. We give the formal security definitions and notions of UDVRS and UDVRSP. Then, we propose a UDVRS and a UDVRSP scheme, with rigorous security proofs without random oracles.
This work is supported by the National Natural Science Foundation of China (No. 60403007 and No. 10571181) and Natural Science Foundation of Guangdong Province, China (No. 04205407).
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Li, J., Wang, Y. (2006). Universal Designated Verifier Ring Signature (Proof) Without Random Oracles. In: Zhou, X., et al. Emerging Directions in Embedded and Ubiquitous Computing. EUC 2006. Lecture Notes in Computer Science, vol 4097. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11807964_34
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DOI: https://doi.org/10.1007/11807964_34
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